The people at the party were worried about Janet because no one was aware of where she had gone.
参加聚会的人们都为珍妮物担心,因为没人知道她去哪里了。
Every solid object will reflect a sound, varying according to the size and nature of the object.
任何固体者反射声音,反射的声音因物体的大小和性质的不同而不同。